Family Kamehameha (????????? Oyako Sandai Kamehameha, lit. Great Three Parent and Child Kamehame Waves) is the ultimate combination of the Father-Son Kamehameha and Bros. Kamehameha used by Goku, Gohan, and Goten in their Super Saiyan forms.
Super Saiyans Gohan and Goten launch their Bros. Kamehameha at the opponent but struggle to make headway. Then, their father Goku descends to stand beside them, transforming into Super Saiyan and joining them with his own Kamehameha, manifesting the Family Kamehameha. All three family members then unleash even more energy to overwhelm and engulf the opponent in the ensuing energy wave.